Option 2 completely blocks out the stemwall at the garage door and then a thicken edge is poured where the slab meets the footing at the garage door this seems to be the preferred method in western washington.
Slab section at garage door.
Slab jacking is one method that can correct the tilt of an entire concrete slab floor.
Slab jacking with slurry.
These doors are single solid slabs that slide up and into the space above your car when they re opened.
Garage doors use either torsion springs or extension springs to raise and lower the door.
Torsion springs mount on a bar above the door while extension springs stretch down the side of the upper tracks.
It utilizes your existing concrete slab with only minor touch ups required if the slab jacking efforts succeed.
Single panel garage doors were all the rage before sectional doors came into fashion.
The concrete settled after the initial installation and as the concrete began to settle the door began to sag thus creating a gap.
Type 1 is sometimes referred to as a thickened slab garage foundation and type 2 is often referred to as a stem wall garage foundation and type 3 is often referred to as a hybrid stem wall garage foundation for the reason that it is a combination of both type 1 and type 2 and is often used in areas that have highly plastic soils conditions such as is found in south dakota and other parts of the u s a.
In nearly 90 of these instances a wood garage door was removed.
The slab edge system in the link is only r7.
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These doors are generally more than 20 years old.
Or you could double layer your 1 goods.
They occupy a similar amount of space as a sectional garage door but can function quite differently.
But it is still cheaper than demolishing and re building your garage.
You cannot do this yourself and it is expensive.
2 thick t g xps comes in 2 wide sections by a number of different lengths 8 10 12 and on edge at the door would deliver r10 down to about the same depth as your interior insulation.